Device to prevent rotation of bobbins



Nov. 2 1926. 1,605,306

` W. H. WAKEFIELD DEVICE TO PREVENT ROTATION OF BOBBINS ed May 4hv 1925 Patented Nov. V2, 1926i.

UNITED STATI-:s-

tatiana vParri?. orricr..

alxnoyvtss Loon MASSACHUSETTS.

, Weens, oEwoEcEsTEE, MessaciinsETTs, A CORPORATION or DEVICEV- ELVC)r ROTATION VOF" BOBBINS.

Application led May 4, 192,5. -Seral- No. 27,641.

Y This invention relates to improvements in.

multi-color weft replenishingl "mechanism for looms and an obtiect of the invention is to prevent rotation of bobbins on'their axes:

in such mechanism asfthey await transfer into an 'exhausted shuttle.

n multi-color weft replenishing mechanism of the usual type the 'bobbins are .arranged'in parallel vertical stacks and :are released one at a time to move from a selectedstac'k to a common transfer position.

It islfound that 'the vibrationofithe loom causes the bobbins' to rotate'on their axes soas to twist the'endof the` filling"v extend-` ing V"from the thread holder resulting in breakage of the filling at the' time 'of transfer. 'In my 3o-pending' applicationSerial No. 702,11'5 ,there isshown' a pivoted wall between adjacent stacks of bobbins normally held against the` 'bobbins 'to' prevent vibration thereof. At Aindication of weft exhaustion the wall is moved to` bobbin releasing position and immediately returned to bobbin restraining position irrespective of the length of` time lapsing' between the indication of weft exhaustion and the subsequent transfer. 'IliisintervalVv of' time may be several picks, during which it is desirable that the bobbins be restrained but in the mechanism set forth in said application the bobbins'are released for a short length of time only and it is the principal object of my present invention to .provide 'a somewhat longer time for the releasing of the bobbins without requiring tliem'to remain limiestrained until transfer. It is 'a more particular objectof. my invention ytol provide an auxiliary slide actuated by the color selector ofthe weft replenishing mechanism and held inboth extreme positions by meansof av toggle and spring` the auxiliary slidebeingretu-rned to normal bobbin restraining position positively by the regular osoillationof the color selector. i Y

Vit-h these and other objects in view which will appear as'thedescription proceeds, my inventionv residesin the combination and arrangement of parts hereinafter described an set .forth yin the claims.

'In the'eaccompanying drawings wherein a convenient embo4 i'meit `Offmy"invention is illustrated, i

Fig. 1 is a side elevation of 'a multi-color weft `replenisliing mechanism having my invention applied 4thereto as viewed fromthe central portion of vthe loom,

Fig. `2. isa horizontal section taken on line 2 -2"ofrFig. 1, l

Fig. 3 is'a vert-ical section taken on line 3 3. einig. 1,

` Fig. f1 is a-view similar to Fig.v 2 but showing the parts in a 'different position, andv Fig.-A 5Y is a detail view similar to Fig". 1 showing the upper end of the auxiliaryslide and the `togglegas they appear when in raised position. l

f, Referring more particularly to the draw.- ings it will be seen that I have provided a weft replenishing frame on which is guided for longitudinal and .angular motion a shaft 11` having secured thereto a color selector 12y which is provided with a plurality of 4fingers 13. Saidiingers are movable longitudinally with t-he shaft 11-and are moved angularlyin'twol directions from the positionfshown in F ig. 3, the downward motion being' regular and occurring every'- second pick "when the shuttle is on that side of the loom opposite the 'replenishingmechanism and: the up motionoccurring only atindicationy of weft exhaustion when the shuttle isv on 'the weft replenishing side of the loom by means of link` 14 and leverl4 show-.n in Fig. 1. 'Guidedlfor vertical movement on the` frame 10 is va plurality of upriglitfslide's 16 each of which is provided'with upper and lower lugs 17, and 18, respectively, positioned for engagement with one or the'other of the fingers 13. "1

he frame 10v 1s provided with stationary walls 19 and has pivotally monnted thereon walls 20 which cooperate with adjacent'walls 19 to-deiine vertical -compartmentsforthe heads of the 'bobbins Atindication ofsubstantial weft exhaustion' the slide lcorresponding to theV active shuttle will be raised .to give, the lowermost bobbin of the associated lstack or 1corripfart,rnei'it its initial movement` towardtra'nsfer position-` Tlie'slide 16 will remain raised until the indicating. shuttle again arrives under the replenish-,-

ing mechanism at which time Vsaid 4slide is restored normal down' position tof 4give the hobb-inV itssecond final movementto- Werd' transfer Peeling@- The 'mattf'thu's far described, with the exception of the pivoted walls 20, is substantially the same as set forth in Patent No. 1,030,748.

The device for actuating the walls 20 comprises an auxiliary slide 30 movable between lined guides 3l and has a foot32 formed therewth and extending over the fingers 13. rlhe upper end of the slide 30 has pivotally connected thereto as at 33 a pair of linlrs el through which pass studs 35 secured to and extending` from the walls 20. Said links are normally out of alignment and angularly disposed with respect to each other substantially as shown in Fig. l, being held in this position by a tension spring 36 hung between the studs 35. Stop screws 3'? and 38 on the slide 30 engage the lower and upper guides 3l. respectively to limit mov ment of said slide. Said spring 36 normally holds 'the walls 2O as shown in Fig. 2 in bobbin restraining position and at indication of substantial weft exhaustion the slide 30 will be raised to rock the walls 20 to bobbin releasing position. rlhis portion of the device is substantially the same as thatiset vforth in said co-pending application Serial No. P[O2/llo.

is previously stated the device set forth in the aforesaid application permits the slide 30 to remain in raised position for a comparatively short time only, said slide moving down with the linger 13. ln order to provide a short dwell in the motion of the slide 30 to afford more time for the dropping` of the bobbins, I arrange the links 34C so that the pivot 33 will pass slightly above the line joining the studs 35 as the finger 13 approaches the end of its upward travel so as to hold the parts in the bobbin releasing position shown in Figs. 4 and 5. On the following pick the lingers 1 3 will be given their regular downward motion at which time one or the other of them will the lower foot 39 of the slide 30 to depress the same and restore it to normal position with the walls 2O in bobbin 're straining position. In the aforesaid appli- Aation a separate finger is secured to the shaft ll but I have found that the usual fingers i3 can be employed to move the slide 30 inasmuch as one of said fingers will always lie between said auxiliary slide and the adjacent slide 16.

F rom the Vforegoing it will be seen that l have provided means for normally restraining vibration of the bobbins and for temporarily removing the strain for ap proximately one pick of the loom at the time of indication of weft exhaustion, the interval during which the bobbins are released being entirely independent of the Vnumber of piclrs lapsing between the indication of exhaustion and the subsequent transfer but being longer than the comparatively brief interval during which the selector lingers 13 are in raised position. lt will also be seen that the toggle connection af-A forded by the links 34C provides for holding the walls in bobbin releasing position until the subsequent pick, the movement of the walls 2O toward bobbin restraining position as the pivot 33 passes above the line of the studs 35 being negligible and insufficient lo interfere with the descent of the bobbins. it will also be seen that said auxiliary slidel is raised and lowered by the usual lingers of the color selector.

Having thus described my invention it will be apparent that changes and modifications may be made therein by theses `l in the art without departing from the spirit and scope of the invention.y and l do nel wish to be limited to the details herein disclosed but what l: claim is:

l. ln a device to prevent rotation of bobbins in weft replenishing mechanism, a bob* bin compartment, a controller to regula-tc the delivery of bobbins therefrom, a bobbin restraining` device normally preventing rotation of the bobbins, an angularly movable actuator having a movement in one direc tion on an indicating piel; of the loom to move the controller and also to engage the device and move the same 'to bobbin releasing position, and a retainer for the device to hold the latter in bobbin releasing position independent of the angularly movable actuator, said actuator having a second regularly recurring movement in the opposite direction to engage the device and restore the saine to bobbin engaging position on a non-detecting pick of the loom.

2. In a device to prevent rotation of bobbins in weft replenishing mechanism, a bobbin compartment, a controller to regulate the movement of bobbins from the compartment, a bobbin restraining device normally`V engaging the bobbins to prevent rotation thereof and movable to bobbin releasing position, an actuator movable from normal position upon indication of weft exhaustion to move the device to bobbin releasing posi tion and returnable immediately thereafter to normal position, and means independent of the controller and operable by the actuator on the next pick of the loom to return the device to bobbin restraining position.

3. In a device to prevent rotation of bobbins in weft replenishing mechanism, a bobbin compartment, a controller to support and regulate the delivery of bobbins from the compartment, a restraining device normally acting to 'restrain vibration of the bobbins, means operable upon indication of weft exhaustion to move the controller and the restraining device to release the bobbins, and a retainer acting independently of the means to hold the restraining device in bobbin releasing position, said means having a subsequent periodic movement to engage the lll) retaining device and restore the same to hobbin restraining position. Y

4. In a device to prevent rotation of blobbins in weft replenishing mechanism, a bobbin compartment, a controller to regulate the delivery of bobbins from the compartment, a restraining device normally in engagement with the bobbins to prevent rotation thereof, an actuator to move the controller and device simultaneously to release the bobbins, means to hold said device in bobbin releasing position for one pick of the loom, and means acting thereafter and independently of the controller to restore the restraining means to bobbin engaging position. l

5. In a device to prevent rotation of bobbins in weft replenishing mechanism, a bobbin compartment, a bobbin restraining device normally engaging the bobbins in the compartment to prevent rotation thereof, a controller to regulate the delivery Lof bobbins from the compartment, an actuator to move the controller and device to bobbin releasing position simultaneously, a retainer independent of said actuator' to hold the device in bobbin releasing position for one pick of the loom, and means acting thereafter independently of the controller to return the device to normal bobbin engaging position.

6. In a Weft replenishing mechanism for looms, a bobbin compartment, a controller to regulate the delivery of bobbins from the compartment, a device acting normally to restrain rotation of the bobbins While in the compartment, an actuator to simultaneously move the device to remove the restraint from the bobbins and actuate said controller, and means acting independently of the controller and moved by the actuator to return said restraining device to normal position after a delay of one pick.

7. In a device to prevent rotation of bobbins in weft replenishing mechanism, a plurality of pairs of bobbin compartments, a movable vvall for each pair of compartments, an actuator movable at indication of weft exhaustion, controlling means for the Walls, and links defining a toggle connecting said controlling means and said Walls, said actuator adapted to move the toggle past the center thereof to hold the controlling means and Walls in bobbin releasinor position independently of the position of the actuator.

8. In a device to prevent rotation ofloobbins in weft' replenishing mechanism, bobbin compartments, controllers movable to regulate the delivery of bobbins from the compartments, devices to restrain rotation of the bobbins, said devices being effective to release as Well as restrain the bobbins, means to move the devices out of bobbin restraining position as the controllers move, holding means to retain the devices out of bobbin restraining position temporarily, and means acting on the holding means to overcome the effect of the latter to return the devices to bobbin restraining position after one pick independently of the control means. p

9. In a device to prevent rotation of bobbins in Weft replenishing mechanism, a plurality of bobbin compartments, a controller for each compartment to regulate the movement of bobbins, an angularly and longitudinally movable actuatorrfor the controllers having fingers to engage one of the con trollers at a time, and a device to preventrotation of the bobbins in the compartments having a portion operatively positioned with respect to one or the other of said fingers in all longitudinal positions of the actuator to be moved to bobbin releasing position as the actuator moves angularly in any longitudinal position thereof.

In testimony whereof I have hereunto aihxed my signature.

WALTER I-I. WAKEFIELD. 

